Wagner Group captures headquarters of the Southern Military District and the building of the Ministry of Internal Affairs in Rostov, the headquarters of Russia's base of operations for War in Ukraine
It actually is much worse than it seems - I did a write up over on Mastodon to explain why and how (https://mastodon.social/@andrei_chiffa/110599724720727202). The TLDR is that cities taken by Wagner mercs will be hard to retake without leveling, all internal protection troops are either tied or were lost in Ukraine, and mercs themselves have nothing to loose and all the revenge to take.
The Wagner Group, is a Russian paramilitary organization. It is seen as a private military company (PMC), a network of mercenaries, or a de facto private army of Russian President Vladimir Putin's former close ally Yevgeny Prigozhin.
The group operates beyond the law in Russia, where private military companies are officially forbidden. Because it operates in support of Russian interests, it receives equipment from the Russian Ministry of Defence (MoD) and uses MoD installations for training, the Wagner Group is said to be a de facto unit of the MoD or Russia's military intelligence agency, the GRU.
While the Wagner Group itself is not ideologically driven, various elements of Wagner have been linked to neo-Nazism and far-right extremism.